Warp tensioning control



Oct. 18, 1938. A. T. GUILD WARP wnusxomue CONTROL Filed April 13 1934 2 Sh t Sh t 1 VEN Q I v Jlrchibalgilaylor (hum Oct. 18, 1938. A. T. GUILD I WARP TENSIONING CONTROL:

' Filed April 15, 1934 2 Sheets-Sheet 2 I INVENTO-R .flrchibaldTaylnrfiuild,

ATTORNEYS I Patented Oct. 18, 1938 UNITED STATES PATENT OFFICE WARP TENSIONING CONTROL Archibald Taylor Guild, Saratoga Springs, N. Y.,

assignor to Van Raalte Company, North Tonawanda, N. Y.

Application April 13, 1934, Serial No. 720,464

6 Claims. (01. 242-131) 10 of thread such as real and artificial silk threadsfrom spools or packages upon a beam, thread being delivered from cross wound packages, cops or spools whereby the thread runs freely and is delivered rapidly, passing through eyelets and be- 5 ing engaged in tensioning discs, the amount of tension of any particular tensioning disc being generally controlled by means of weighted washers.

In the employment of this prior method where 20 the discs are not properly weighted, the threads tend to run generally upon one portion of the disc producing grooves therein should the operation continue for sufiicient periods of time without causing rotation of the tensioning discs. Further, 5 when the discs fail to rotate, loose particles of thread such as slubs of yarn and fluff pass to the needle bar of the knitting machine or into the fabric creating imperfections therein.

Where grooves have been worn in the discs there is substantially'little tension upon the individual threads engaging the grooved discs and where automatic stop motion is used in conjunction with the warpbeam winding excessive stoppage of the machine is produced due to the de- 35 crease in tension of they particular threads.

Fig. 1 is a fragmentary plan view oi a creel showing the tensioning device attached thereto. I

Fig. 2 is a section partly in elevation of a fragmentary portion of a creel showing threads passing from packages of thread to the improved tensioning device.

Fig. 3 is a side elevation of the means for simultaneously changing the angle of thread engagement of a plurality of the tensioning discs.

55 Fig. 4 shows an enlarged view of the improved tensioning disc attached to means adjacent an eyelet bar of the creel for varying the tension of threads.

Fig. 5. is a cross sectional view taken on the line V-V of Fig. 4.

Fig. 6 is an enlarged fragmentary view of an eyelet bar of a creel showing another form of the improved tensioning device attached thereto; and

Fig. 7 is a cross sectional view taken on the line VII-VII of Fig. 6.

Referring more particularly to the drawings, a creel is indicated generally at H) provided with longitudinally extending members such as angle irons i l to which spindles l2 are attached. Packages, cops or spools of thread I3 are carried upon spindles I 2 in the usual manner and thread is delivered from the packages l3 and passes through eyelets i4 provided in the eyelet bar l extending longitudinally of the machine and adjacent the front thereof, an eyelet bar being provided for each series or row of spindles and thread packages and being provided with a plurality of eyelets i4 corresponding in number to the number of spindles or thread packages carried in the row.

The thread l6 after passing through eyelets M in eyelet bar I5 is engaged, as is well shown in Figs. 4 and 5, between the upper and lower tensioning discs, such as I! and I8 and thereafter passes (Fig. 2) through an eyelet is provided in guide bar 20 extending outwardly from the creel I!) after passing through heddles (not shown) engaging the electrode bar 2| as more fully described in a co-pending application S. N. 674,938, now Letters Patent No. 2,017,008 dated October 8, 1935, dealing with an improved method of direct winding of a warp beam from a creel provided with automatic stop motion.

In the form of the invention as shown in Figs. 4 and 5, a tensioning disc supporting member 35 is spaced from the outwardly extending flange 26 of eyelet bar l5 and supported upon and pivotally attached at 31 to the bar or strap member 36. In order that the tensioning disc support member may be moved relatively with respect to the creel l0, member 35 is pivotally attached to flange 26 at 38, pivot points 31 and 33 being made by means of bolts and nuts as shown or by other well known means. The disc supporting member 35 extends longitudinally of the creel and adjacent the front thereof as shown in Figs. 1 and 3, being supported by a plurality of strap members 36 and 36', etc., and bearing thereon a plurality of post members 23, each post engaging a thread tensioning device. A plurality of disc supporting members are provided for each creel and in general there are as many of such members as there are rows of spindles. By positioning post member 23 upon disc supporting bar 35 at a point onset or out of line with respect to eyelet l4 sufficient angle of engagement of thread it with tensioning discs l1 and I8 is provided for so that by movement of the disc supporting member 35 in the direction of the arrows toward either the position A or B the angle of engagement is changed and the speed of rotation of the discs correspondingly changed, an intermediate position being found where a minimum of rotation or substantially no rotation occurs. In general, moving the disc supporting bar in the direction of arrows A or B will speed up the rate of rotation of the disc to a maximum while at a particular point of movement a position of minimum speed of rotation or no rotation will be produced depending upon the type of thread engaged by the tensioning disc. By placing eyelet I 3 toward the warp end of creel I3 a'snubbing action of thread I6 is obtained on eyelet l4 and post 23 while a friction engagement is obtained by pass ing the thread between discs l1 and IB.

In order to change the angle of engagement of a plurality of threads, a plurality of tensioning discs are attached to the disc supporting member 35 and may be moved simultaneously by effecting movement of the disc supporting member 35 or, as shown in Fig. 3, a plurality of disc supporting members 35, 35', etc., may be attached by means of the end bars 44 and 45 which are threaded at their upper and lower ends and a loose fitting engagement made with members 35, 35', etc., by

means of nuts 46 and 41. Thus, upon movement of end bar 43 either to left or right, as shown in Fig. 3, movement of the entire group of tensioning discs supported upon the tension support bars 35, 35', etc., is correspondingly effected.

It will be seen from the above description that a device and method whereby the tension of threads leaving thread packages on a creel is provided and whereby a plurality of threads engaged by tensioning discs may simultaneously have their angle of engagement changed with respect to the tensioning disc and effect the proper tensioning thereof by causing rotation of the tensioning discs with attendant advantages pointed out above.

This movement of the tensioning discs changes the snubbing action on the thread as well as the friction tension due to engagement of upper and lower discs I! and I8 and hence the necessity of using weighting washers upon each individual device is substantially eliminated.

In another form of the invention shown in Figs. 6 and 7, I have provided tensioning discs attached adjacent but offset from eyelets formed in the eyelet bars and positioned upon an outwardly extending flange of the eyelet bar. The tensioning device comprises post member 23 formed from the screw headed bolt 24, surrounded by a porcelain or other smooth surfaced sleeve 25, attached to outwardly extending flange 26 of eyelet bar l by means of nut 21, leather or other fabric type washers 28 and 29 being provided at the top and bottom of porcelain sleeve 25. The tensioning disc proper is formed of the upper and lower tensioning discs I! and I8 which are formed with an apertured center portion and having a curved or cup-shaped bottom portion. In accordance with my invention, the tensioning disc is offset from the cooperating eyelet, as shown in Fig. 6, whereby thread l6, passing from a package of thread through eyelet M in eyelet bar I extends angularly from the eyelet and is engaged by tensioning discs II and I3, thereafter passing through eyelet 30 positioned in the upwardly extending flange portion 3| of strap member 32 pivotally attached to flange 23 of eyelet bar I3 by means of bolt and nut members 23 and 21 respectively. In order to prevent grooving oi the tensioning disc, movement of thread passing between upper and lower tensioning discs l1 and I8 should cause rotation of the discs and eliminate the necessity of adding weighted washers thereon. I have provided means for changing the angle of engagement of the thread with tensioning discs by moving strap member 32 as indicated by arrows in Fig. 6, movement of the member in direction C or D varying the angle of engagement of the thread and in general changing the speed of rotation of the discs, an intermediate position being reached wherein a minimum of rotation or no rotation occurs. By moving strap member 32 to a position at which rotation of upper and lower tensioning discs is induced proper tensioning of the threads suiilcient to support a heddle away from contact of the electrode bar 2| with inadvertent stoppage of the machine is obtained while at the same time grooving of the discs is prevented and the formation of slubs eliminated. By providing for change of the angle of engagement with the thread the tensioning discs are capable of properly tensioning threads of varying diameter, texture and weight without the necessity of providing weighting means upon the disc.

It will be seen that by providing the porcelain eyelet M at a point farther toward the front of the creel, i. e., toward the warp than the center of the tensioning disc, yarn passing therethrough around the porcelain port member 23 and between the discs I! and I8 is subjected to a combined tension consisting of a snub tension and a friction tension, the snub being caused by the eyelet and post, and friction by the weight of the upper and lower discs squeezing the thread.

By moving bar 32, eyelet 30 may be set so that the angle of engagement of thread l6 between upper and lower discs is such as to produce substantially continuous rotation of these discs thereby preventing the release of the friction tension with production of slack thread and a consequent false stop or the production of an uneven warp. Further, continual rotation of these discs prevents lodgement of bits of lint, slubs, dirt, etc., between the discs with release in tension.

I have obtained good tension and maximum rotation of the discs with a thread angle of about 105. By moving the bar in the direction of the arrows toward either C or D, the speed of rotation of the discs decreases and finally ceases. By providing for adjustment of this angle of engagement, the device is adaptable for use with a variety of types and sizes of yarn as well as a wide adjustment of speed of rotation.

I claim: Y

1. In av device for delivering thread under tension, 9. creel for holding a plurality of packages of thread, an eyelet bar having eyelet guides for guiding threads passing from the packages, tensioning means comprising an upper and lower disc adapted to receive a thread therebetween, one of said discs being rotatable, a post attached to said eyelet bar and engaging said means, a bar member pivotally attached to the post, and means on said bar for engaging a thread passing from said d s s.

2. In a device for delivering thread under tension, a creel for holding a plurality of packages of thread, an eyelet bar having eyelet guides for guiding threads passing from the packages, tensioning means comprising an upper and lower disc adapted to receive a thread therebetween, one of said discs being rotatable, a post attached to said eyelet bar and engaging said means, a bar member pivotally attached to said post at one end, and thread engaging means upon its other end for engaging a thread passing from said discs.

3. In a device for delivering thread under tension, a creel for holding a plurality of packages of thread, an eyelet bar having eyelet guides for guiding threads passing from the packages, tensioning means comprising an upper and lower disc adapted to receive a thread therebetween, one of said discs being rotatable, a post attached to said eyelet bar and engaging said means, a bar. member pivotally attached at one end to the post, the other end having an upwardly extending flange thereon, and an eyelet in said upwardly extending flange for engaging a thread passing from said discs.

4. In a device for delivering thread under tension, a creel for holding a plurality of packages of thread, an eyelet bar having eyelet guides for guiding threads passing from the packages, a post mounted upon said eyelet bar, upper and lower tensioning discs engaging said post and adapted to receive a thread therebetween, one of said discs being rotatable, a bar member pivotally attached at one end to the post, the other end having an upwardly extending flange thereon, and an eyelet in said upwardly extending flange for engaging a thread passing from said discs.

5. In a device'for delivering thread under tension, a creel forholding a plurality of packages of thread, an eyelet bar having eyelet guides for guiding threads passing from the packages, a. post attached to the eyelet bar, tensioning means rotatably connected to said post comprising upper and lower discs adapted to receive thread therebetween, one of said discs beingrotatable, a bar member pivotally attached to the post, and thread engaging means upon the end ofsaid bar for engaging a thread passing from said tensioning means whereby the angle of engagement of a thread with the tensioning discs can be continuously varied from an angle of minimum tension upon a thread through an angle of maximum tension thereon.

6. In a device for delivering thread under tension, a creel for holding a plurality of packages of thread, thread guiding and tensioning means associated with said creel and comprising a horizontally extending bar of angular cross section disposed adjacent said creel, said bar having a vertically disposed leg having a plurality of thread guiding eyelets therein and a horizontal leg at the lower edge of said vertical leg and extending in a direction away from said creel, frictional thread tensioning means associated with each eyelet and comprising coaxial rotatable disclike elements with facing convex surfaces, means for supporting said tensioning means on the horizontal leg of said angle bar for rotation about a vertical axis and with the abutting surfaces 01' said tensioning means in horizontal alinement with its associated eyelet whereby a thread from said eyelet may pass between said rotatable ele-.

ments, and pivotal means for varying the angle between the entering and leaving portions of said thread in said friction means.

' ARCHIBALD TAYLOR GUILD. 

